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The SP4 1707 Loudspeaker Switchbox / Sharer
NEW The Baldwin HiFi SP4 1707 Loudspeaker switchbox.
If you have a transistor style Power Amplifier you will know that too many loudspeakers plugged in at the same time will cause that amplifer to overheat and blow up.
The new SP4 (also available in an 8 way version) uses loudspeaker crossover technology to enable you to listen to as many loudspeaker sets as you like without affecting the frequency range available. The amplifier will 'see' a fixed impedance of Spkr set 1 or the dummy load only.
Listen to set 1 (directly coupled) and/or switch in up to 3 more sets (DeCoupled) at the same time to tune your system to the room acoustics as you need without the fear of blowing your power amplifier up.
20Hz-20kHz audio is passed through without interference.
It can also,of course, be used as a Speaker comparitor too. Click Here to View Pricing
SP4 Front
SP4 - External dimensions: Width 172mm (6.75"), Height 70mm (2.75"), Depth 261mm (10.3") (not including the stick out components).
SP4 Rear
4mm 'Banana' connectors with unscrew wire connections too.
Layout showing the Internal Boards.
Components
Speaker Protection Board:
On power up the protection board monitors the amplifier output - measures for no Direct Current (DC) - and if clear automatically enables the Switch box. This circuit will dis-engage all the loudspeakers if it 'sees' an amplifier fault and the red engineering LED on the front panel will light up.

DC Filter:
This enclosure is powered by an external DC PSU (24V @ 1Amp). These Switch mode power supplies are very noisy - the DC Filter negates all of the PSU noise through the audio path within the box.

VU Drive:
This board provides a converter which monitors the connected Amplifier AC output to enable the meters to show the power output levels. A meter switch on the front panel allows the VU meters to run at full power (switch up) or become more sensitive for lower volume levels (switch down). 2 internal trimmer controls are included.

Relay Drive Board:
Unlike other loudspeaker switch units, the SP4 uses 10 Ampere capable relays to enable each loudspeaker set.
This ensures longevity of operation - and noiseless switching.
Wiring Diagram
Wiring Diagram
Wiring Diagram
Wiring Diagram
SP8 Front
An 8 way version has been built.
SP8 Rear
Contact Paul for more information.

Warranty:

The ReelAudio Custom Built Baldwin Loudspeaker Switchboxes are guaranteed for a period of 12 months from the date of purchase.
Normal Usage is implied by the word 'Guarantee' and 'Warranty'.

Click Here to view the Products & Pricing Page.

Machines left in the workshop for more than 6 Months and not collected will be disposed of as Storage Costs are high.

Any carriage costs are the responsibility of the Client

All Warranty repairs are undertaken on a return to base principle.
Any carriage costs are the responsibility of the Client

REELAUDIO MAKES NO WARRANTY, EITHER EXPRESS OR IMPLIED WITH RESPECT TO ANY PRODUCT, AND SPECIFICALLY DISCLAIMS ALL OTHER WARRANTIES, INCLUDING, WITHOUT LIMITATION, WARRANTIES FOR MERCHANTABILITY, NON-INFRINGEMENT AND FITNESS FOR ANY PARTICULAR PURPOSE. REELAUDIOS' SOLE OBLIGATION AND LIABILITY FOR PRODUCT DEFECTS SHALL BE, AT REELAUDIOS' OPTION, TO REPLACE SUCH DEFECTIVE PRODUCT OR REFUND TO BUYER THE AMOUNT PAID BY BUYER THEREFOR. IN NO EVENT SHALL REELAUDIOS' LIABILITY EXCEED THE BUYER'S PURCHASE PRICE. THE FOREGOING REMEDY SHALL BE SUBJECT TO BUYER'S WRITTEN NOTIFICATION OF DEFECT AND RETURN OF THE DEFECTIVE PRODUCT WITHIN NINETY (90) DAYS OF PURCHASE. THE FOREGOING REMEDY DOES NOT APPLY TO PRODUCTS THAT HAVE BEEN SUBJECTED TO MISUSE (INCLUDING WITHOUT LIMITATION STATIC DISCHARGE), NEGLECT, ACCIDENT OR MODIFICATION, OR TO PRODUCTS THAT HAVE BEEN SOLDERED OR ALTERED DURING ASSEMBLY, OR ARE OTHERWISE NOT CAPABLE OF BEING TESTED, OR IF DAMAGE OCCURS AS A RESULT OF THE FAILURE OF BUYER TO FOLLOW SPECIFIC INSTRUCTIONS.

IN NO EVENT SHALL REELAUDIO BE LIABLE TO THE BUYER OR TO ANY THIRD PARTY FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, PUNITIVE OR EXEMPLARY DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS, LOST SAVINGS, OR LOSS OF BUSINESS OPPORTUNITY) ARISING OUT OF OR RELATING TO ANY PRODUCT OR SERVICE PROVIDED OR TO BE PROVIDED BY REELAUDIO OR THE USE OR INABILITY TO USE THE SAME, EVEN IF REELAUDIO HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

Units are Designed and Hand Built by:
Paul Baldwin
www.ReelAudio.Co.UK
Founder: BaldwinHiFi.Co.UK
12 Tack Lee Road
Yapton
Arundel
West Sussex
BN18 0HB - UK - Great Britain

Direct EMAIL: neverfinished0@hotmail.com
EBay Customers: Please use this direct email with your questions - the Ebay email system is now amazingly unusuable
and history has shown that either one of us can get banned for asking or responding to technical questions.

Tel: 01243 553231 - Mobile: 07858 089421
Please note: Paul may be contacted by telephone during his preferred admin period of between 5pm and 8pm. Thankyou.

Payment for Goods: PAYPAL Account: neverfinished0@hotmail.com
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