CLASSIC AUDIO AND VIDEO EQUIPMENT

Speaker Protection Devices

Quantity Available Make, Model Range, Power, Imaging Rare Item

In Original Box, Used, etc; Condition 

Special Features 

12 - SOLD

11 remaining

Pro-Tech

QED SP-150

USA?

 

Passes full frequency range with no distortion

 

Each unit originally purchased for $120.00. 

10 In Original Box

(all 10 left)

4 Used - still mint

 (3 sold. 1 left)

Never obsolete!

Protects speakers against

damaging signal levels,

with no degradation or

compromise of audio signal

 

 

 

 

   

2 - SOLD

4 remaining

Pro-Tech

QED SP-150SC

USA?

 

Passes full frequency range with no distortion

 

Each unit originally purchased for $120.00.

1 In Original Box

3 Used - still mint

Similar to the Pro-Tech

QED SP-150, except that the SC version "literally short circuits the amplifier to protect the speakers" (quoted from the warning label on the product box). Caution:  Continuing the quote on the product warning label, 'We strongly suggest that you contact the manufacturer of the amplifier to confirm that this is acceptable."