Back to square one with speaker and amplifier upgrade

Rubicon15

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Apr 25, 2025
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1958 LC
After spending a considerable amount of time researching speakers and the Beats Encore “plug-n-play” amp, I’m back to the drawing board on my 1958. For those of you who have followed a few threads regarding this topic and the parallel wiring Toyota used on the 1958, you may have realized by now that we don’t have a 4 ohm system.

With the OEM 8 ohm dashboard speakers and 4 ohm front door speakers, the ohms are 2.67. If you already replaced the dashboard speakers with 4 ohm speakers, the ohms are 2.0. Read the email I received from Beats below.

“Thank you for providing the additional information and the attached picture for our review. We understand your concern about potential damage to the OEM radio and equalizer, and we appreciate you bringing this data to our attention.

As we've discussed, our ENA-2T3 amplifier is rated for 4-8 ohm impedance, and we haven't conducted specific testing with a 2-ohm load in your particular vehicle configuration and wiring in parallel. Therefore, we are unable to offer a definitive guarantee that the amplifier will not experience any issues or potentially affect other components in the long term when used with a 2-ohm load.

As mentioned in our previous correspondence, if you prioritize long-term reliability and want to ensure optimal performance without the risk of overloading the amplifier, especially if you anticipate further system upgrades or increased listening volumes, opting for an amplifier specifically designed to handle 2-ohm loads would be the safest approach.”

Based on the attached information, the Beats amp is clearly not an option. I’m not willing to take the risk of damaging the OEM head unit, equalizer or have the system shut down repeatedly do to overheating. I plan on putting this upgrade on hold until a few more options are available.
 
I have a ENA-3T3 that I was going to install in my 1958. This gives me pause. Thanks for posting this up.
 
I have a ENA-3T3 that I was going to install in my 1958. This gives me pause. Thanks for posting this up.
This is really your call. Unfortunately, Toyota made upgrading the system a bit difficult. I really don’t understand why they chose to install 8 ohm speakers in the dashboard and 4 ohm in the doors. Luckily, I read someone else’s post regarding the parallel wiring and how it impacts the ohms etc.

I was hoping to receive a much better response from Beats. At least they were honest. I have to give them credit. However, I was surprised they didn’t do their homework before marketing the amp. Basically, we only have a few options if you want to use their amp, again untested. Re-wire the front 4 speakers, disconnect the dashboard speakers (this needs to be tested) or purchase an amp that is rated for 2-4 amps. None of the new amp options are plug-n-play.

I still need to dig a little deeper and find out more specs on the 1958 head unit. The ohm rating is something of great interest.

Since I live in the south with 100 degree temperatures, I simply won’t chance installing the Encore knowing it has the potential to overheat at 2-2.6 ohms. A few people have reported problems with the amp shutting down intermittently (do to the overheat protection) etc.

I wish Beats upgraded the amp to push 2-4 ohms. This is what it should have been spec at from the beginning. IMO, they are pitching an inferior product related to the LC.
 
Is this only a problem if you want to replace the amplifier? I was going to go without the amplifier anyways. Already replaced the dash speakers with 4ohms and am considering replacing the door speakers with infinity reference.

E.g. https://www.crutchfield.com/S-tvNt1V9OYds/p_108R697F/Infinity-Reference-REF697F.html

So far the dash speakers have been fine and don’t sound out of phase. No polarity reversing.
Great question. I assume, the head unit must be rated a 2-4 ohms. I emailed Toyota Friday and requested the information. I think the 1958 head unit pushes 15 watts but at 2-2.6 ohms it would be slightly higher.

If you own a 1958, I would stay clear of the Beats amps. You’re looking for problems. You need an amp rated between 2-4 ohms not 4-8.
 
I wasn’t planning on an amplifier anyways. Is there really a difference between the stock head units of the 1958 vs premium trims without JBL?
 
I wasn’t planning on an amplifier anyways. Is there really a difference between the stock head units of the 1958 vs premium trims without JBL?
I don’t know. It appears the specs on the head units are a secret, no one knows… Toyota has no idea and they don’t have a number for a technical division etc. I’m sure the data is posted on the head unit somewhere. Maybe someone can share a picture of the label on the head unit itself. For now, I may just replace the dashboard speakers with JL Audio C2 350’s. They are 4 ohms not 8 like the OEM. They are rated at 25 watts RMS. I think the head unit may be 15 watts.
 
I’d be surprised if they were different. Also, I thought I saw in one of the official beatsonic amp install videos that it was done on a 1958 but maybe I’m wrong. What they sent you sounds like they’re just covering their ass from being liable for issues.
 
I’d be surprised if they were different. Also, I thought I saw in one of the official beatsonic amp install videos that it was done on a 1958 but maybe I’m wrong. What they sent you sounds like they’re just covering their ass from being liable for issues.
I agree. Obviously, if they weren’t honest, I could hold them accountable for any damage to the head unit, amp, or equalizer. Unfortunately, there are a lot of people that have already installed the amp not knowing that it is prone to overheating on the 1958 due to the parallel wiring and 2-2.6 ohms. The amp is designed for 4-8 ohm applications.
 
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