Yamaha TRBX304 Active /Passive Switch

Has anyone ever installed an active/passive switch into a Yamaha TRBX304?
Is it even possible?
If it is what switch recommendations would you have?

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I haven’t done it, but have heard of people bypassing the onboard preamp, so it may be possible.

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It’s totally possible and I considered doing it to mine, but really you’re better off just buying a 504 and selling the 304 instead. The 504 will feel just like the 304 to you, but lighter and better. The neck is the same.

The midrange knob is much more useful than the 5-position switch.

Here’s a similar discussion:

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@howard

I love my 304 and the only difference I see between the 304 and the 504 is the active/passive switch, and a different set of pickups. Are the 504 pickups that much better?
How is the 504 lighter? According the specs they are both mahogany.

Specs: https://europe.yamaha.com/en/products/musical_instruments/guitars_basses/el_basses/trbx/specs.html#product-tabs

The reason I was considering adding the switch was a difference I heard in the tone when the switch was in passive mode. It seemed to be a lot more vintage/darker in passive.
Of course this could be due to the Alnico over Ceramic pickup difference.
I am not sure if the differences between the 304 and 504 would be worth the additional $200.00 unless the alnico pickups are that much better. I know nothing about tone characteristics between alnico and ceramic.

Speaking of differences, the only difference I see between the 504 and the 604 is the body material for a $350.00 price difference over the 304 or $150.00 difference over the 504.
I do not think I could justify the $150.00 price increase of the 604 over the 504 if this body wood is the only difference. Maybe I am missing something.

I thought you had bought the 604 over the 504.
Could you please tell me why?

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Actually the 504 might not be lighter than the 304 - good point.

My 604 is a pound lighter than my 304 was.

The pickups are much more rich and less sharp sounding to me, and having a midrange control on the EQ is more useful than the selector switch on the 304.

The big differences:

304 - great intro bass for features, comes in some very cool gloss colors
504 - adds AlNiCo V pickups, Active/Passive switch, midrange control on EQ, loses preset selector, comes in subtle, more “woody” satin colors
604 - adds Alder body (much lighter and slightly brighter), flame maple top (looks amazing IMO), different preamp voicing

I would say the 504 is definitely worth the price difference over the 304. At least those are all features important to me. And of course the price difference is much, much less if you buy used (always a good idea).

Whether or not the price difference between the 604 and 504 is worth it to you is a good question. I definitely enjoy its light weight and looks.

I was saving up for a new or used 504 when my 604 went up for sale. I got it for $350, used, in perfect condition. You should be able to find used 504s in the $350 price range without issue, and may get lucky like I did with a 604.

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@howard

I agree and have decided that the 504 is the way for me to go.

In looking at the specs the only difference I see between between the 504 and 604 is the body material and looking at the colors available on the 604 I do not feel it is worth an additional $150.00 over the 504.

As far as purchasing used, where I live in rural Ontario, there is nothing available used or new right now. I guess I could find one on a US website but then I have the added expense of shipping and duties to pay and that is not worth it to me because it will add another $200+ to the price.

I thank you for your time and effort and as stated will get the TRBX504 eventually.

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That’s a great choice. It’s an excellent bass!

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@howard

Just got on the list for a new TRBX504.
In Canada it will take 6 months to arrive.

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@howard

Well today went very well for me and I managed to luck out and find a music shop that just took delivery of the TRBX504 and I pulled the trigger immediately and moved from a 6 month delivery to a 4 day delivery with a 10% discount and free shipping on a new TRBX504.

Perseverance pays off I guess and I have been checking twice a day, every day for the TRX504 in Canada to avoid foreign exchange and import duties for several weeks now.

I have no idea how to sell my TRBX304 that is only a month old. I know I will not sell it for less than $100Cnd (plus freight) below what I paid for it. Maybe I can start a new topic and ask for advice on selling it if that is allowed.
This will be a first for me because I have never sold/traded any of my guitars so far.

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Congrats! I bet you’ll love the 504.

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@howard

Well I have your information to thank for my decision and after seeing a video from @Jazzbass19 on Alnico vs Ceramic pickups I decided it was worth the upgrade.

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It’s a pretty serious upgrade. The 304 is a very good entry level bass; the 504 is a great all around bass.

You took exactly the same path I did out of love for my 304 :slight_smile:

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