Amplifer Impedence with switch |
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Lazy_Lucus
New Member Joined: 12 October 2018 Status: Offline Points: 4 |
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Posted: 12 October 2018 at 9:13pm |
Hi I'm building a small DIY 12v boom box
My question is: Will placing a switch between an amplifier out put and driver alter the impedence enough to damage the amp? I want to a have feature that allows me to switch between the in built speakers (the ones screwed into the boom box) and an external set of passive speakers. I plan to use a DPDT switch to swap between the two sets of speakers (L&R). The switch would be placed between the passive speaker (L&R in built and L&R external) and the amplifier output (30w 2-8ohm). Hope to here back from you soon, many thanks.
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Lazy_Lucus
New Member Joined: 12 October 2018 Status: Offline Points: 4 |
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ADDITIONAL INFORMATION
Here is the switch I was talking about:
https://www.ebay.co.uk/itm/Mini-Latching-Toggle-Switch-DPDT-ON-OFF-ON-AC-3A-250V-6A-125V-6-Pin-New-Quality/122501096845?var=422945837963
The amp: https://www.ebay.co.uk/itm/LVPIN-LP-838-Super-Bass-Hi-Fi-2-1-Stereo-Amplifier-For-AMP-PC-Car-Home-Play/173541371788?_trkparms=aid%3D555017%26algo%3DPL.CASSINI%26ao%3D1%26asc%3D20151005190540%26meid%3D346b015f1f72497f8a6a61cf762fab53%26pid%3D100505%26rk%3D1%26rkt%3D1%26%26itm%3D173541371788&_trksid=p2045573.c100505.m3226 The impedance on the external speakers would 4-8 ohms and the impedance of the in built speakers is 6 ohms. |
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Lazy_Lucus
New Member Joined: 12 October 2018 Status: Offline Points: 4 |
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Another question in a separate in a very vain:
is it possible to wire a dual potentiometer in series between the out put of the amp and the driver, or would this increase the impedance too much and damage the amp? thanks again for taking the time to read my stupid questions :) |
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I-shen Soundboy
Registered User Joined: 21 December 2016 Location: Big Smoke Status: Offline Points: 375 |
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Use switched jacks instead of DPDT switches: Inserting a jack speaker lead breaks the internal speaker circuit.
If you want to attenuate speakers post amplification, use L-pads. Happy googling.
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