Bottlehead Forum

Bottlehead Kits => BeePre => Topic started by: Moodyhh on June 22, 2024, 02:52:10 PM

Title: Add XLR Input to BeePre2
Post by: Moodyhh on June 22, 2024, 02:52:10 PM

Hello All,

Does Bottlehead offer a kit for adding balanced XLR inputs to a BeePre2?  I’ve looked around, but I’m not seeing anything.

Also, given the choice of input type, either RCA or XLR, which do people prefer?

Thanks,
Moodyhh

Title: Re: Add XLR Input to BeePre2
Post by: Paul Birkeland on June 22, 2024, 06:21:03 PM

Here is the pertinent information (linked from an archive since the page got wiped out a while ago)
https://web.archive.org/web/20170716200138/https://bottlehead.com/bee-pre-input-transformer-modification/ (https://web.archive.org/web/20170716200138/https://bottlehead.com/bee-pre-input-transformer-modification/)

We do not stock input transformers, as they are pretty expensive and a custom order product. Beyond that, you need some Neutrik XLR jacks, a 5 lug terminal strip (the Cinch or Keystone ones are fine), and a pair of 22K resistors, then you're good to go.

Title: Re: Add XLR Input to BeePre2
Post by: Moodyhh on June 24, 2024, 06:37:19 AM

Thanks.

Also, given the choice of the input type, either RCA or XLR, which do people prefer, and why?

Thanks,
Moodyhh

Title: Re: Add XLR Input to BeePre2
Post by: Paul Birkeland on June 24, 2024, 09:38:23 AM

If you're putting input transformers in, then you really should use XLR jacks with them.

Title: Re: Add XLR Input to BeePre2
Post by: Larpy on June 24, 2024, 10:58:45 AM

As a jack, is there anyone who would defend the RCA over XLR?  The only disadvantage the XLR has is that it takes up more space.  Otherwise, it's superior in every way, right?

Title: Re: Add XLR Input to BeePre2
Post by: hmbscott on June 24, 2024, 12:42:44 PM

I think it's a little strong to say that XLR is better in every way. The only important benefit XLR offers is improved noise rejection, but at the cost of greater complexity, cost and size. Noise rejection is of greatest value with very low signal levels, such as microphone cables, long low-level cable runs, and in electrically noisy environments. All tree are common in pro audio, which is likely why it's favored in that environment.

However, if your RCA runs aren't contributing noise to your system, XLR is not better in any way.

Title: Re: Add XLR Input to BeePre2
Post by: Doc B. on June 24, 2024, 01:56:58 PM

The XLR plug and socket is a much more robust connector system that stands up much better to frequent plugging and unplugging. But it is a PITA in home audio systems simply because the overwhelming majority of gear uses RCA connectors.