Zaph|Audio SR71 Kit - Pair - Parts Only
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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 enclosure 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 now uses a low DCR Solen PL 14AWG inductor (please note the picture depicts the older style caps and coils). 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. We can quote you for this if you want to add that circuit.
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:
- (2) Seas Prestige ER18RNX H1456 7" Reed/Paper Pulp Cone Woofers
- (2) Seas Prestige 27TDCF H1189 1" Pre-coated Fabric Dome Tweeters
- (2) Professionally Assembled Crossovers (see crossover schematic)
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.
Outstanding
Outstanding
Multi facet baffle 18 liter design SR71
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.
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SR71
Granite Monitor
I highly recommend this kit. Great quality speakers and x-overs for the money.
Best Bookshelf!
I highly recommend SR71 as a 2-Way bookshelf DIY project, and it indeed is a classic.