The pages on this website can give sufficient information for the experienced speaker and electronics builder to duplicate the PLUTO or to build something similar to it. A 32-page manual provides detailed drawings, material lists, assembly and test procedures to build PLUTO exactly as I designed it. Working with the manual will be a great time saver and give you the confidence that you will obtain the speaker's intended performance and the full reward for your efforts.

The cost of the PLUTO Construction Plans is $70

For shipping add $10, US or international.

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Building the three power amplifiers, crossover, equalization and power supply circuitry is greatly simplified by using a printed circuit board. Each component in the circuit diagram carries a designation which is repeated on the circuit board. The corresponding component in the material list, contained in the above manual, also carries this designation so that it is easy to just follow the material list when loading a component onto the circuit board. The component leads are soldered from the backside of the board. A few exceptions are spelled out. The most convenient sequence for building up the circuit board is described in the manual. Turn-on and test procedures lead to safe and correct function of the circuit.

The cost of a PLUTO circuit board is $50

Shipping is included when ordered with the PLUTO Construction Plans. Otherwise it is $10 in the US or international for up to 6 boards.

Electrical test requires a digital voltmeter, DVM, for DC and AC voltage measurements and a source of 1 V sinewave signals of 100 Hz, 1 kHz, 5 kHz and 10 kHz frequency.

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A CD is available with signals for electrical test of the circuit board assembly and for acoustic test of the completed loudspeaker.

The cost of a PLUTO Test CD is $20

Shipping is included when ordered with the PLUTO Construction Plans.

Tracks
1 - Pink noise, alternating left, right 2:03
2 - Pink noise, mono 5:03
3 - Jazz 1 6:22
4 - Male chorus 2:29
5 - Stage play 4:12
6 - Jazz 2 4:32
7 - Piano concerto 6:26
8 - Soprano 1:46
9 - 100 Hz sinewave 5:00
10 - 1 kHz sinewave 5:00
11 - 5 kHz sinewave 5:00
12 - 10 kHz sinewave 5:00

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Building the electronic section of PLUTO on your own might be too demanding or time consuming for your taste. You have to order all components yourself. Their cost is around $150 plus $50 for the circuit board. We can provide a fully assembled and tested electronics module like you see on the right. You merely need to solder into the circuit board the four leads from woofer and tweeter drivers and two more leads, if you use binding posts, for high level input signals coming from a power amplifier output.

The cost of one Pluto-2 Electronics Module is $395

Shipping for 2 Modules is $25 in the US and $50 international.
Indicate in the order form when 240 VAC operation is required so that the transformer is wired accordingly and the proper fuse is installed.
The module is configured with heat sinks, and for the enclosure, and the Seas driver L16RN-SL (H1480-08) of Pluto-2. The module for the Peerless driver is no longer available.

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If you like to attach a logo to your PLUTO, then download the pluto-logo1.gif file and print it out.

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In the PLUTO Users Group forum you can find useful information for building PLUTO and possibly make contact with PLUTO owners for a listening session.

Updates and continued support are provided on the Owner-Support page.

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To estimate the total cost for a pair of PLUTO assume that the four drivers will be about $140. They are available, for example, from www.madisound.com . Electronic components are about $280 and available from www.digikey.com . The pipes, fittings, wood and miscellaneous hardware for the enclosures are around $60 and should all be available at your local hardware store. Thus the total cost could range between $480, if you need nothing more than the information on this website, have time, experience and patience, and around $1000 when you start with the PLUTO Construction Plans, two Electronics Modules and a Test CD. You need to be able to cut PVC/ABS pipes to length and build two simple wooden boxes. When using the Electronic Modules, you still need to strip, tin and solder 26 wire ends into driver terminals, circuit board pads, etc. without creating electrical short circuits.

Ordering information

Send an e-mail message with the subject "PLUTO order" to tell me the details of your order and to provide me with shipping information.
Copy the example below between the dashed lines into an e-mail message to sl@linkwitzlab.com and correct the underlined text .
(Drag your mouse over the text to highlight it, then COPY and PASTE into your e-mail message)

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Shipping Label:

John-Alexander Smith
345 Kensington Street
Apartment #54
New York, NY 10019
USA

Items ordered for PLUTO construction:

(1) - Construction Plans ($70):    1
(2) - Test signal CD ($20):    0
(3) - Electronics Module ($395):    2
        240VAC operation, yes/no:    no4) - Printed circuit board ($50):    0

Subtotal $860.00

Shipment of:
Construction Plans ($10 US and international)
Electronics Module, ($25 US, $50 international)
Printed circuit boards (if not included with Construction Plans, $10 US and international, for up to 6 boards)

Shipment total $35.00

Total order $895

PayPal fees (3% US, 4% international) $26.85

PayPal / Money Order in the amount of: $921.85 sent on 22 May 2008 .

Note: All material is copyrighted and for the personal, non-commercial use by the person who bought it from LINKWITZ LAB. It may not be passed on in any form for use by others.

Comments: Anything you want to tell me
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Payment options

You can pay with credit card over the Internet by using PayPal. In that case, please add a 3% payment fee (4% international) to the total cost of materials and shipping. My address for PayPal is: sl@linkwitzlab.com .

Alternatively you can purchase and send me a Postal Money Order, International Money Order, Western Union or Thomas Cook Money Order, or a Bank (cashier's) Check drawn in $USA currency and made out to Siegfried Linkwitz. I will wait with shipment against a personal check from a US bank until my bank has cleared it. A direct transfer of money from your bank to my bank account is not feasible due to unpredictable additional fees.

Send your payment to:

LINKWITZ LAB
15 Prospect Lane
Corte Madera, CA 94925
USA
sl@linkwitzlab.com (for PayPal)