Zaph|Audio SR71 Kit - Pair - Parts Only

Price: $379.00


  • Buy 10 - 10,000 and get an additional 10 % off
Manufacturer: Zaph Audio
Product ID : za-sr71-p
Weight: 16.00 lbs
Manufacturer: Zaph Audio
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*We are currently on back order for the ER18RNX (H1456) woofers used in this kit. The next batch is due to arrive at the end of July. If you place your order before then, let us know if you would like the kit shipped complete when the woofers arrive or if you prefer the in-stock parts shipped right away and then the woofers when they arrive.*

Zaph|Audio SR71 Kit - Pair - Parts Only
Price shown is for a PAIR

The ZA-SR71 is designed for Madisound by John Krutke of Zaph Audio. John is a true asset to the DIY speaker building community, and we are very pleased to offer you an easy to build kit based on his expertise. Detailed information about this system can be found on Zaph Audio.

Both drivers are from the Seas Prestige lineup. In our opinion, the Prestige line offers unparalleled performance for the price. The mid/bass is the ER18RNX (H1456), a 7” Reed/Paper Pulp Cone woofer with a copper shorting ring in the magnet system. This driver provides smooth response, excellent excursion and very low distortion. The tweeter is the extremely popular 27TDFC (H1189). This ferrofluid cooled tweeter employs a High Definition pre-coated fabric dome with a wide soft polymer surround. The optimally dampened rear chamber allows for a low crossover point.

This kit is designed for use a 0.5cf rear ported enclsoure with measurements of 9.1” W x 15.4” T x 10.5” D. Detailed cabinet plans are available on Zaph Audio

Crossover Information:

The SR71 crossovers come professionally assembled on a Matrix circuit board. The parts hold to the exact values called for in the scematic. High quality parts are used throughout the paralel circuits, including film capacitors and air core inductors. The series tweeter circuit uses metal oxide resistors and a Clarity CSA Cap, while the series woofer circuit uses a low DCR Sledgehammer Steel Laminate 15AWG inductor (please note the picture depicts the older-style SA caps). The crossovers are bi-wire/bi-amp capable.

The series inductor in the crossover may also be upgraded to a Goertz Copper Foil 14AWG. Tube amp users should consider adding the impedance flattening circuit to the crossover. All these options are available on the drop down menu above.

NOTE: If you choose to add the impedance flattening circuit, you can no longer biwire/biamp the speaker.

ZA-SR71 Specifications:

  • Frequency response: 44 Hz – 20+ kHz
  • Recommended amplification: 25 W – 150 W per channel
  • Long term power handling: 80 W
  • Short term power handling: 250 W
  • Crossover point: 1.75 kHz (1,750 Hz)
  • System sensitivity: 85 dB in-box including BSC
  • Nominal impedance: 8 ohms
  • 15.4” Tall x 9.1” Wide x 11” Deep (see cabinet drawing)
  • 0.5 cubic foot (14 liter) bass reflex

ZA-SR71 Parts-Only Kit Includes:

You may also choose to purchase the optional accessories package. The accessories package is offered at a discounted price, and will provide you with all the miscellaneous speaker building parts that you need to complete your kit. It is highly recommended that you purchase this accessories package if you do not already have your own stock of parts.

Optional Accessories Package Includes:

  • (2) TD-CUPS - gold plated dual binding post input cup
  • (2) 2FLARE - precision flared port tubes (cut middle piece to 2.25" long)
  • (12ft) Supra Classic 1.6 - tinned oxygen free copper internal speaker wire
  • (0.2lb) Acousta-Stuf - fluff & fill behind woofer and cover crossover
  • (1pc) Foam Sheet - cut & glue to internal walls
  • (1) GOOP - glue for foam sheets
  • (8ft) Foam Tape - for airtight seal of drivers to cabinet
  • (2R & 2B) QC110 Quick Connects - for tweeter tabs
  • (6R & 6B) QC187 Quick Connects - for woofer and TD-CUP tabs
  • (20) OXSOCKET8X1 Socket Head screws - mount drivers to baffle
  • (20) OX8PAN1 Phillips Head screws - alternative to socket head
  • (8) OX6OVAL3/4 - mount TD-CUP to cabinet
  • (1pc) Silver Solder - solder internal wire to drivers/crossovers/input cup

Kit pricing shown includes a discount on all drivers and accessories package. Crossovers are available for seperate purchase from the drop down menu.

Single or odd numbers of this kit are available for 1/2 the price of the pair. Call or write us a note in the "comments" section of your order to request this.

Madisound also carries several other Zaph Audio speaker kits

Want custom cabinets built?

Many of our cabinets can be custom built by Lee Taylor & Co. of Philmont NY.  Please follow the link below to Lee's website and discuss veneer options and pricing.  Lee can also put your speakers together for an additional fee. For over twenty years Lee has been building speaker enclosures for speaker companies, kit builders, experimenters and designers. Using veneer presses for veneering, never paper backed or contact cement. His finishing facilities and extensive shop capabilities create the very finest quality work. Each detail, from cutting in drivers, bracing, veneering to joinery: “drop dead gorgeous” (Stereophile). Customer's frequent responses are: “your work is amazing!," and "I’m shocked, astonished and delighted.”  

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Product Reviews

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Reviewed by mike
mike bought "Zaph|Audio SR71 Kit - Pair - Parts Only" on our website
11/14/2018 - 09:40:43 PM
Sr 71
I purchased this kit back in jan 2012.I never got it done until Oct 2018 for many reasons.I finished it in OCT 2018.Long time to wait to be very happy with my purchase.After completing the kit I had to step away and be blown out of the waters.I had no idea this kit would sound as good as it does.I'm just blown plumb out of the water folks.These speakers sound much bigger than their size and powerful in the bass,great in the midrange and sweet in the highs.I kick myself for waiting for so long.These speakers sound as good as my large ones{no name mentioned} but very high quality speakers and am using both an Adcom set up and a Mcintosh MA6100 to see what sounds the best.I'm thinking the MCintosh is the winner on these speakers.Loving what I hear..fantastic speakers.SR71 very happy and then some.Great speakers.Get you a pair of these and dump the sub wont need them!These are Sweet and you wont regret it.I just might get another Pair..
Reviewed by Bradley5555
Bradley5555 bought "Zaph|Audio SR71 Kit - Pair - Parts Only" on our website
04/13/2018 - 07:04:36 PM

Built the standard kit to specifications and thought it sounded great with nice balance and detail. Having listened to Vifa metal dome tweeters for years, I found that I prefer metal over fabric. Switched the tweeters out for the Seas prestige h1212 aluminum/magnesium tweeters. Well, the Zaph SR71 just got a whole lot better! Metal instruments sound better when reproduced by metal tweeters. Excellent!! Strings and cymbals sparkle. Great service and help from Madisound with all my questions.
Reviewed by zarrdoss
zarrdoss bought "Zaph|Audio SR71 Kit - Pair - Parts Only" on our website
01/30/2016 - 08:48:39 PM
Multi facet baffle 18 liter design SR71
I got the standard kit with no upgrades, I read through tons of reviews and info online and decided to build a bigger version of these and made a standard pair of speakers, just a little deeper 1/2" round over on the front baffle corners and tuned to 38Hz by adding 1/2" to the port length.
I am simply amazed about the sound on these, they sound like much bigger way more expensive speakers. Even after break in the tweeter did sound a bit on the bright side but not bad by any means.
So I still had a half a sheet of MDF left over and had an idea of what I wanted to build and then saw a picture of another SR71 build online and decided that's what I wanted to go for. The sound stage got a tad bigger with the new design but the tweeter got way to bright. I adjusted the resistance on the tweeter by adding 2 more ohms upping it to a Mills 6 ohm and now they sound phenomenal. Not fatiguing in any way even at loud listening levels, highs are crystal clear, vocals sound clean and accurate everything sounds just as it should.
I cannot recommend this kit enough, extremely high quality, cross overs are top notch. These sound like you paid sever thousand dollars for them.

Reviewed by bought "Zaph|Audio SR71 Kit - Pair - Parts Only" on our website
05/11/2015 - 02:23:28 PM
I’ve built two pairs of SR71 speakers, the first as a wedding gift to my daughter and her husband. After hearing this pair I was so impressed I build a second pair, just completed, and these are for me. This is a great design, very easy to listen to and I highly recommend it. With the second pair, I did increase the cabinet volume slightly from 14 liters to about 17 liters. The baffle size remains the same, the cabinet just got a little deeper and I added a bit more bracing. I don’t have the original pair I built available for a direct comparison but the new pair seem to go just a bit deeper and the mids seem a bit more open sounding. (Maybe just the placebo effect?) I have a somewhat challenging room for audio and these speakers sound better than any of the other speakers I’ve tried. Warm, full bodied for such a small speaker with a smooth overall sound and good imaging. Even my non audio friends noticed how good they sound. I’m sure you can get even better sound from more expensive kits but it seems to me that this design might represent the best value verses sound you’re likely to find. I built my own cabinets so discounting my time, I have about $550 in the pair. You would need to spend $2000 a pair to get anything near this performance level from a commercial speaker.
Reviewed by Scottiemojo
Scottiemojo bought "Zaph|Audio SR71 Kit - Pair - Parts Only" on our website
06/03/2013 - 11:56:34 PM
Granite Monitor
I bought this kit last year and set them into a custom built Granite enclosure. At first I thought like there was a lack of low range and the highs where over polluting the sound. I then did some adjustments (added some more sound fill), and they came alive. I have taken my speakers to numerous HiFi shops around my area, the employees stand amazed at the clarity. I have run them against my families Totums and Keff (reference III)'s and they are 2x clearer than them. They tend to bring up the music 'fill' that is added during mix downs. Dire Straits - Brother In Arms has a whole new sound to it now.
I highly recommend this kit. Great quality speakers and x-overs for the money.
Reviewed by vodomore
vodomore bought "Zaph|Audio SR71 Kit - Pair - Parts Only" on our website
03/15/2013 - 08:16:53 AM
Best Bookshelf!
I bought SR71 parts only, and finished building it in Dec. 2012. For a first time DIYer, building the cabinets was painful. Thanks to Zaph's excellent design and detailed documents, it turned out well worthy. The sound quality is superb! Comparing with some $1,000 price range commercial builds, SR71 is apparently at a higher level; and with no exception, all my friends were astonished by the sound quality.
I highly recommend SR71 as a 2-Way bookshelf DIY project, and it indeed is a classic.
Reviewed by Seren2
09/28/2012 - 10:53:16 AM
'Built the SR-71 s when they first came out nearly 2 years ago and haven't had any desire to upgrade since. Read Zaph's page for this to make sure you understand how they should be setup. If you do not have a similar environment, there are several variations on how to modify the crossover for less baffle step etc. I bought the precut baffle and built the cabs. There's no overhyped bass, so you may want to use a deep sub for the very lowest lows' Review by Jeff Paoletti. Posted by Madisound.
Reviewed by Seren2
09/28/2012 - 10:52:51 AM
'I built this kit around a month ago. For the first 20 hours or so, I was not impressed. After that? Well, they sing like heaven. I have a small listening room, around 10 x 12 x 8. I had been using Totem Arro's. Up to the SR71's, the Arro's were the best speakers I had tried in this small room. The Arro's won't be going back. The SR71's meet or exceed everything the Arro's do well. Plus, the bass response is much better. Full, deep and tight, the bass response is superb in my small room. I really don't think anyone could do better for twice the price. For those who can do excellent cabinet work, this kit is worthy of your best work. I bought the kit with the cabinets. While the supplied cabinets are very nice, I'm thinking about having someone build a set of cabinets worthy of these loudspeakers. Very nice speakers, to say the least!' Review by Merle Scruggs. Posted by Madisound.