HiVi research drivers and Home theater speakers

Back in September 2007 Adam constructed a pair of 3-Way DIY Tower Loudspeaker using all HiVi Research drivers. Well, as most of us in this hobby know - once you start building, you just can't stop! The photo below shows Adam's HT setup up in 2007 sporting his new DIY tower loudspeakers.


And here is a more recent photo of his HT setup.


In the photo are a couple of new projects. A DIY HiVi SP10 10" subwoofer and a DIY HiVi home theatre center channel. Consistent with his previous tower loudspeaker build, only drivers from HiVi Research were used and all of the speaker enclosures are constructed using MDF with a black oil based epoxy paint finish and red oak trim.

Adam reports excellent results and seamless integration with his HT setup. His only complaint is that he needs matching rear channels now.

Fostex FE103En and Solo 103 Build

Kris at HIFI ZINE has tried out the Solo 103 enclosure with the new Fostex FE103En driver. The Solo 103 enclosure was originally meant for the Fostex FE103 (a.k.a. ACR FE103) and there have been many positive reports with the more recent Fostex FE103E. For full impression of the Solo 103 speaker with the new Fostex FE103En drivers see A Solo 103 Build.

Solo 103 Build with Fostex FE103En

Build Speakers ProAc Response 2.5 Introduction This is a do-it-yourself (DIY) version of the ProAc Response 2.5, which is one of the most famous spea

Introduction

This is a do-it-yourself (DIY) version of the ProAc Response 2.5, which is one of the most famous speakers in his class of about 1996 to 2003. This model has been replaced by a new model in 2003 called the reaction D25, using different units of the driver, but always in the same way two floostanding concept. 2.5 The answer is regarded as one of the most successful and ProAc known models and is a testament to the skill and expression of its designer ProAc Tyler Stewart. It is perhaps one of the broadest range of 2-way floor conventional speaker cone of his class and is always a good speaker, even by current standards survey. It is a bass reflex design manual "with a good quality, Scan Speak drivers. Drivers used in the draft may not Scan Speak best airline pilots, but it is integrated into a very special way to the best sound possible. The original ProAc Response 2.5 sound is characterized as very musical, soft, consistent, melodic, rich and with a very low bullet proof (for the size). What is missing in May micro dynamics extreme detail in the midrange and treble, it's just because of the tone, even many large and more complex speakers are unable to provide. The draft will ProAc Response 2.5, such as sound or better, depending on your choice of crossing pieces. Try it and you will not be disappointed.

Please note that these sites main purpose is to provide a speaker who is close to the original design in terms of character and expression. After reading this site, you think that can is the only do-it-yourself project to build speaker, because it is well developed and examined. Keep in mind that all the speakers choice of the pros and cons and should be adjusted to your taste, room environment and equipment. There are many other do-it-yourself projects also depends on your situation, some in the links on this website.

Dimensions



Width: 225mm
Height: 1020 mm
Depth: 255mm

Compensation for the large internal volume (2 liters or more) as the addition of large changes weirs.

Approximate weight of the speaker should be completed around 24kg/53lb, but the choice of lightweight materials should not affect the sound.

Port is 140mm long and 75 mm internal diameter and about 350mm high cabinet, and if you like with internal flanges on both ends of the port in the cabinet to reduce air turbulence (use a 100 x 100 mm MDF, which can also brace sided flange or PVC pipe)

50 mm tweeter for high cabinet and outside 35 mm mounted on the side edge (Note: CAO 84mm read error on the side of the cabinet not to 74mm) with 10 mm drivers. 25 mm woofer on the side edges or centered in the middle of the cabinet and 160mm high. Both drivers have been sunk in the case.

Office equipment and stowage: 25mm medium density fibreboard (MDF) for 18 mm and rear side / top and bottom, only 150 mm wide around the port or not.

It seems some models are braced ProAc 2.5, while the other is not and the choice is entirely yours to make. Reports from manufacturers, the two sounds very good. CAO showed brace is placed in the context of the port, in the middle of the cabinet level.

Cabinet coating is 3 to 5 mm or the depreciation of bituminous felt like mass loading, 30 to 50 mm polyester (Dacron 200g/m2 density) stuffing / lining. Siding and depreciation is added to all sides, with the exception of the facade. It is important not to specify or low, so the quantity and density of the coating is used to a balanced voice of the speaker. This may have more effect on the sound as other more expensive and crossing specified components (capacitors and inductors). More companies will lead to unwanted lint-free and forced polling less bass and midrange speakers Express. If you can not find the density or thickness, close to the estimate of the liner.

Cabinet internal volume is 34 liters after the wall of the depreciation is inserted. However, up to 38 liters in volume have been reported in deeper bass extension. Changes in the size of the company for what should be done by increasing the depth and maintain the forward bulkhead of the same size 225mm.

Install base of 25 mm and 20mm thick confluence of all sides on issues, which improves the stability and bass.

Drivers

Tweeters
Scan-Speak D2010/8513-00 19mm (3/4") dome, 150W

Woofers
Scan-Speak 18W/8535-00 and shielded type, Carbon fiber paper, 178mm (7"), 70W

Speaker sensitivity 86dB (1W/m)

Impedance load 8 ohms

The internal cable is Bandridge Superflex OFC LC 7403 which is used in original Proacs. This product appears only to be available in Europe unless ordered internationally.

Crossover

(thanks to Ben Madisound discussion about who has obtained from a friend who saw Audiophile magazine in Hong Kong).

The DCR chokes in ProAc 2.5 is unknown, but the lowest DCR about 0,2-0,4 ohm is recommended for all stimuli.

The original 1996 Stereophile Magazine review and technical evaluation, said the woofer and tweeter are not in phase with each other and with your last tweeter should consider that route. This is illustrated else in the Chinese magazine liaison offices, but it is now proven and unanimously accepted by both listening tests and measures to reduce the polarity of the tweeter circuit linking Hong Kong is correct (see last crossing to the bottom of this page).

The internal cable Bandridge Super Flex LC-OFC 7403. http://www.bandridge.nl/index2.htm

Thank you for Jacq Madisound discussion forum, steps have been made using the standard non-conductive and free 18W/8535-00 custom 18W/S8535-00, which are slightly different physical parameters of ProAc but n 'not affect the sound ( See the Frequently Asked Questions). With the help of the Chinese magazine with drivers produces a mild to moderate 2kHz sound art, which can be reduced by changing the woofer crossover inducer 1.5mH to 1.8mH and cooler 8.5uf to 7uf Jacq and as recommended by the preference of many . Most of the first critical success is based on the original Chinese magazine tweeter connection with reverse polarity. The differences between the crosses are moderate, but important. If the amendment Jacq crossover is still a strong preference of many people know the original sound of the ProAc 2.5 same with that of other changes proposed by Troels G. and others who have much more work in a more neutral clone version 2.5, which is very different-sounding speaker (see his site at the left). If you seek a more neutral tone, or the application of the 9500 Tweeter Scan Speak its recommendations are highly recommended by many.

Parts List

Part	Qty.	Total
Scan-Speak 18W/8535	2	$266
Scan-Speak D2010/8513	2	$104
Cabinets	2	$100-300
3.4 µf capacitor	2	$50-100
4.7 µf capacitor	2
7 uf (8.5 µf Chinese crossover) capacitor	2
47 ohm / 5 W resistor	4
>5-9 ohm / 5 W resistor	2
0.25 mH inductor (air core)	2	$50-100
0.82 or 0.83 mH inductor (air core)	2
1.8mH (1.5 mH Chinese crossover)inductor (air core)	2
Spikes	1 set	$20
Terminal jacks, internal cabling		$50
Total Project Price		US$640-940

Tags: Schematics, Electronic Circuit, Mosfet Amplifier, Audio Amplifier, Active Filter, Basic Knowledge, Basic soldering, Car Audio, Datasheet, Design, Make PCB, Modding, Power Amplifier, Power RF, Pre Amplifier, Power Supply, Loudspeaker

Build Speakers ProAc Response 2.5

Introduction

This is a do-it-yourself (DIY) version of the ProAc Response 2.5, which is one of the most famous speakers in his class of about 1996 to 2003. This model has been replaced by a new model in 2003 called the reaction D25, using different units of the driver, but always in the same way two floostanding concept. 2.5 The answer is regarded as one of the most successful and ProAc known models and is a testament to the skill and expression of its designer ProAc Tyler Stewart. It is perhaps one of the broadest range of 2-way floor conventional speaker cone of his class and is always a good speaker, even by current standards survey. It is a bass reflex design manual "with a good quality, Scan Speak drivers. Drivers used in the draft may not Scan Speak best airline pilots, but it is integrated into a very special way to the best sound possible. The original ProAc Response 2.5 sound is characterized as very musical, soft, consistent, melodic, rich and with a very low bullet proof (for the size). What is missing in May micro dynamics extreme detail in the midrange and treble, it's just because of the tone, even many large and more complex speakers are unable to provide. The draft will ProAc Response 2.5, such as sound or better, depending on your choice of crossing pieces. Try it and you will not be disappointed.

Please note that these sites main purpose is to provide a speaker who is close to the original design in terms of character and expression. After reading this site, you think that can is the only do-it-yourself project to build speaker, because it is well developed and examined. Keep in mind that all the speakers choice of the pros and cons and should be adjusted to your taste, room environment and equipment. There are many other do-it-yourself projects also depends on your situation, some in the links on this website.

Dimensions



Width: 225mm
Height: 1020 mm
Depth: 255mm

Compensation for the large internal volume (2 liters or more) as the addition of large changes weirs.

Approximate weight of the speaker should be completed around 24kg/53lb, but the choice of lightweight materials should not affect the sound.

Port is 140mm long and 75 mm internal diameter and about 350mm high cabinet, and if you like with internal flanges on both ends of the port in the cabinet to reduce air turbulence (use a 100 x 100 mm MDF, which can also brace sided flange or PVC pipe)

50 mm tweeter for high cabinet and outside 35 mm mounted on the side edge (Note: CAO 84mm read error on the side of the cabinet not to 74mm) with 10 mm drivers. 25 mm woofer on the side edges or centered in the middle of the cabinet and 160mm high. Both drivers have been sunk in the case.

Office equipment and stowage: 25mm medium density fibreboard (MDF) for 18 mm and rear side / top and bottom, only 150 mm wide around the port or not.

It seems some models are braced ProAc 2.5, while the other is not and the choice is entirely yours to make. Reports from manufacturers, the two sounds very good. CAO showed brace is placed in the context of the port, in the middle of the cabinet level.

Cabinet coating is 3 to 5 mm or the depreciation of bituminous felt like mass loading, 30 to 50 mm polyester (Dacron 200g/m2 density) stuffing / lining. Siding and depreciation is added to all sides, with the exception of the facade. It is important not to specify or low, so the quantity and density of the coating is used to a balanced voice of the speaker. This may have more effect on the sound as other more expensive and crossing specified components (capacitors and inductors). More companies will lead to unwanted lint-free and forced polling less bass and midrange speakers Express. If you can not find the density or thickness, close to the estimate of the liner.

Cabinet internal volume is 34 liters after the wall of the depreciation is inserted. However, up to 38 liters in volume have been reported in deeper bass extension. Changes in the size of the company for what should be done by increasing the depth and maintain the forward bulkhead of the same size 225mm.

Install base of 25 mm and 20mm thick confluence of all sides on issues, which improves the stability and bass.

Drivers

Tweeters
Scan-Speak D2010/8513-00 19mm (3/4") dome, 150W

Woofers
Scan-Speak 18W/8535-00 and shielded type, Carbon fiber paper, 178mm (7"), 70W

Speaker sensitivity 86dB (1W/m)

Impedance load 8 ohms

The internal cable is Bandridge Superflex OFC LC 7403 which is used in original Proacs. This product appears only to be available in Europe unless ordered internationally.

Crossover

(thanks to Ben Madisound discussion about who has obtained from a friend who saw Audiophile magazine in Hong Kong).

The DCR chokes in ProAc 2.5 is unknown, but the lowest DCR about 0,2-0,4 ohm is recommended for all stimuli.

The original 1996 Stereophile Magazine review and technical evaluation, said the woofer and tweeter are not in phase with each other and with your last tweeter should consider that route. This is illustrated else in the Chinese magazine liaison offices, but it is now proven and unanimously accepted by both listening tests and measures to reduce the polarity of the tweeter circuit linking Hong Kong is correct (see last crossing to the bottom of this page).

The internal cable Bandridge Super Flex LC-OFC 7403. http://www.bandridge.nl/index2.htm

Thank you for Jacq Madisound discussion forum, steps have been made using the standard non-conductive and free 18W/8535-00 custom 18W/S8535-00, which are slightly different physical parameters of ProAc but n 'not affect the sound ( See the Frequently Asked Questions). With the help of the Chinese magazine with drivers produces a mild to moderate 2kHz sound art, which can be reduced by changing the woofer crossover inducer 1.5mH to 1.8mH and cooler 8.5uf to 7uf Jacq and as recommended by the preference of many . Most of the first critical success is based on the original Chinese magazine tweeter connection with reverse polarity. The differences between the crosses are moderate, but important. If the amendment Jacq crossover is still a strong preference of many people know the original sound of the ProAc 2.5 same with that of other changes proposed by Troels G. and others who have much more work in a more neutral clone version 2.5, which is very different-sounding speaker (see his site at the left). If you seek a more neutral tone, or the application of the 9500 Tweeter Scan Speak its recommendations are highly recommended by many.

Parts List

Part	Qty.	Total
Scan-Speak 18W/8535	2	$266
Scan-Speak D2010/8513	2	$104
Cabinets	2	$100-300
3.4 µf capacitor	2	$50-100
4.7 µf capacitor	2
7 uf (8.5 µf Chinese crossover) capacitor	2
47 ohm / 5 W resistor	4
>5-9 ohm / 5 W resistor	2
0.25 mH inductor (air core)	2	$50-100
0.82 or 0.83 mH inductor (air core)	2
1.8mH (1.5 mH Chinese crossover)inductor (air core)	2
Spikes	1 set	$20
Terminal jacks, internal cabling		$50
Total Project Price		US$640-940

T

Perfect Sound Granite DIY Speaker Project

I have been build this speaker for my brother, these are do-it-yourself (DIY) speakers that and using granite for the speaker box. I listen this speaker, That's Great Perfect Sound, nearly linear reproduction sound. Great Job Man!. Source Perfect Sound Granite DIY Speaker Project.

DIY Granite Speakers with Seas G17REX/P and 27 TFFC Drivers

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Speaker Project Summary
External box dimensions 240 x 350 x 280 mm. Internal box dimensions 200 x 310 x 240 mm. Box material 20 mm thick black granite (Nero Assoluto). Weight 35 kg.
Enclosure volume 14.9 L. Bass reflex enclosure tuned to 45 Hz. Port length 160 mm
Input power 80W. Sensitivity 87.5 dB. Transmission bandwidth 40Hz - 20kHz. Impedance 6 ohm.

Seas Granite Speaker Enclosure Plan

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Seas Loudspeaker Drivers
The drivers selected for this loudspeaker system are from Seas who has been producing speaker drivers for over 50 years. The tweeter is the Seas 27 TFFC which has a fabric dome. The Sonolex lightweight fabric dome has high consistency and provides excellent stability against variations in air humidity. The stiff and stable rear chamber allows for a moderately low crossover frequency (~2500kHz). This made the Seas 27 TFFC tweeter the right choice for our granite loudspeaker project.

The woofer we used is the Seas G17REX/P. The woofer consists of a fiber glass cone, a bullet shaped phase plug and a high loss rubber surround. These are carefully matched to each other resulting in smooth frequency response.

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Speaker Box and Crossover Design
The speaker box and crossover network were designed by M.Janura and K.Sýkory using the LspCAD speaker design software package. A volume of 15L (dimensions 220 x 350 x 250 mm) and a tuning frequency of 45 Hz was used for the speaker box. The dividing frequency is 2.5kHz and the drivers are connected in phase. The crossover schematic and modeled frequency response are shown below.

Calculated Speaker Box Frequency Response - Seas G17REX/P Woofer

Crossover Schematic - Seas G17REX/P Woofer and 27 TFFC Tweeter

Crossover Schematic - Seas G17REX/P Woofer and 27 TFFC Tweeter

The components used in the crossover dividing network are from TESLA. I think that the people in the former Czechoslovakia were able to produce high quality components, but you may use your favorite type. The condensers (capacitors) used in crossover are MKT type - we did not use bipolar condensers because they have disadvantages that I won't further specify. The inductors are air core.

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Sound

I was knocked off my feet with the sound after the first track we played: Everlast - Folsom Prison Blues by the legendary Johnny Cash. The song tested bass response of the speakers. We didn't expect such deep and accurate bass from small speakers. The speakers deliver very detailed sound (soft treble and great imaging). They play rock music aggressively and classical music with emotion. As we say: "they play like HONEY" (it means - brilliant) and they look great too.

I would like to thank to Marian Mózer and everyone in the team for their effort and for the job well done. The loudspeaker system is designed by M.Janura and K.Sýkory - named Besie 1.

We understand that most of you will not be able to make speaker boxes of granite. If you are interested in speakers made from granite, please send me an email and we may be able to help you. Thank you and I hope you enjoyed our project.

Seas Granite Speakers