Speaker Upgrade complete....too much bass on radio

[gwinder]

I just completed upgrading the dash and door speakers with Polk Audio 401s and 651s and with a CD they sound fantastic. However, as soon as I switch to radio, the bass is way too much and I have to turn the bass all the way down to -1/-2. Has anyone experienced the same after changing speakers? And if so, is there a remedy? I haven't changed the HU or factory amp.

02 Boxster S with CDR220 and factory amp (M490 package I think)

Thanks,

Gary

[usaf-lt-g]

I just completed upgrading the dash and door speakers with Polk Audio 401s and 651s and with a CD they sound fantastic. However, as soon as I switch to radio, the bass is way too much and I have to turn the bass all the way down to -1/-2. Has anyone experienced the same after changing speakers? And if so, is there a remedy? I haven't changed the HU or factory amp.

02 Boxster S with CDR220 and factory amp (M490 package I think)

Thanks,

Gary

Does your system have the stock dsp module?

[gwinder]

Not sure about the DSP module...I have the stock head unit with the amp under the hood behind the spare.

Your system sounds nice.

Gary

[usaf-lt-g]

Not sure about the DSP module...I have the stock head unit with the amp under the hood behind the spare.

Your system sounds nice.

Gary

The Stock DSP module looks like the following.... it's necessary for use with the stock amp depending upon which amp you have.

[gwinder]

I don't have the DSP unit. I guess if I want a better sound fro the radio I'll have to switch out the head unit and maybe the amp. I'm OK with CDs for now which sound great.

Gary

[drem914]

The HU holds separate settings for each band and each input so you need to set the bass, treble, fade and balance for each radio band and for the cd.

[atmorris]

I just completed upgrading the dash and door speakers with Polk Audio 401s and 651s and with a CD they sound fantastic. However, as soon as I switch to radio, the bass is way too much and I have to turn the bass all the way down to -1/-2. Has anyone experienced the same after changing speakers? And if so, is there a remedy? I haven't changed the HU or factory amp.

02 Boxster S with CDR220 and factory amp (M490 package I think)

Thanks,

Gary

I did not have this problem, but I swapped out the HU and amp also. You don't really say how you have the 651's mounted, but you seem to indicate that the CD's sound fine, with no over emphasised bass. If so, it sounds more like an EQ issue with the way the CDR220 is set....for example there may be a built in bass compensation (boost) on the radio output circut. I don't know how the CDR220 operates as I had a CDR230, so I'm not sure if there is a way to permanently adjust the EQ specific to the input selected or not.

[atta]

Hi.

I had the same issue. CD sound quality OK, radio crap - even with strong signal. But overall bass was too boomy on either. I swapped out the HU with a Kewood DNX8220BT (euro version of DNX8120) recently and the improvement in SQ is unbelievable! Next step will be to install the Porsche High Perfomance Audio System (new amp and improved speakers) i have sitting in a box. I also have a new Bose sub/rear box that I intend to add. But I think I'll leave both in their box until spring...

Atle

[bustanut]

The HU holds separate settings for each band and each input so you need to set the bass, treble, fade and balance for each radio band and for the cd.

This is what i found. go through your settings for the radio and cd seperately with the manual.