Equalize this thread!

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Line Out

Member (SA)
It's just too bad that in the era of 10+ bands they tend to put the lowest frequency at 100Hz. Would've been great to have more options for bass fine tuning. Hitachis have "63Hz" but I think it affects on higher frequencies than that. Though the Q-value surely is very low too (effects on a wider range, lower number means wider curve, higher=steeper).

But if you are a fiddler, you may want to check out the chips that are used for the EQ. It shouldn't be massive work to alter the frequencies, I found the datasheet for the ICS 5 band EQ and the frequency is set with two small caps per band.
 

SpaceLobster

Member (SA)
Panamax Pana-8710

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I also have a Lasonic TRC-931 with one and a ICS STR-5091 but it's missing the equlizer buttons.
Peace
 

Lasonic TRC-920

Moderator
Northerner said:
Omg I haven't got a single box with an equaliser on it! Might have to fix that omission :-)

W-H-A-T ? ? ?

How can this be?


Line Out said:
It's just too bad that in the era of 10+ bands they tend to put the lowest frequency at 100Hz. Would've been great to have more options for bass fine tuning. Hitachis have "63Hz" but I think it affects on higher frequencies than that. Though the Q-value surely is very low too (effects on a wider range, lower number means wider curve, higher=steeper).

But if you are a fiddler, you may want to check out the chips that are used for the EQ. It shouldn't be massive work to alter the frequencies, I found the datasheet for the ICS 5 band EQ and the frequency is set with two small caps per band.
Keep in mind when most of these radios were made, digital music wasn't invented yet which could produce low frequencies on recordings.

I have wondered if it was possible to lower the frequency of the lowest slider. That would be cool.
 

Line Out

Member (SA)
Lasonic TRC-920 said:
Keep in mind when most of these radios were made, digital music wasn't invented yet which could produce low frequencies on recordings.

I have wondered if it was possible to lower the frequency of the lowest slider. That would be cool.
Well, no. Low frequencies have definitely been around, but most of these plastic boxes are really struggling below... lets say 70Hz. Of course the best boxes and grails are more capable and some can produce very low frequencies. And the cassette players usually extend at least to 50-60Hz. HiFi decks can go below 30Hz with ease. For example, 70's and 80's disco can have quite a thump and low bass... Its not about type of music. And an extreme sample, organ music, played in a big church, can go really, really deep, even below 10Hz. Thats been around for some time eh?

It's possible, you just have to lurk inside and find the EQ-IC, then find a datasheet for it. Mostly they have used a 5-band IC or two to create a 10-band EQ. The frequencies are controlled via external components.
 

Retro Addict

Member (SA)
I think I can take part in this one. :-)

Hitachi 3D2
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Hitachi 3D8
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Philips D8534
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Sharp WQ-274
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Saisho P929
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Panasonic RX-CS780
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Panasonic RX-CT900
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Proline PTX-2000
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Unisef SZ-5000
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