The Pioneer GM-A6704 is a four-channel car amplifier rated at 60 watts RMS per channel and bridgeable to two channels for more power to a subwoofer or front speakers. A built-in bass boost adds low-end punch, and speaker-level inputs let it work with a factory radio that has no preamp outputs. It suits drivers upgrading stock speakers on a budget who want more clean volume than a head unit alone provides. Compared with premium four-channel amps it is short on power and tuning features, but owners treat it as a solid entry-level step up.
In stockReturn policy
Owners describe the GM-A6704 as an affordable way to get noticeably louder, cleaner sound from stock or mildly upgraded speakers. Many praise the simple install and the bass boost, while some say it runs out of headroom with power-hungry speakers.
The Pioneer GM-A6704 is a 4-channel bridgeable car amplifier. It powers front and rear speakers with 60 watts RMS per channel, more than a typical car radio supplies. The added power brings out more detail in music, especially when the volume is raised to overcome road noise.
The A channels have a variable high-pass filter and a switched low-pass filter. The B channels have switchable high- and low-pass filters and a switchable bass boost. It accepts both preamp and speaker-level inputs, and it can be bridged to 2 channels.
