Shhhhhhhhh!
I'll tell you what lets just keep it our little secret aye !
Beats me !
I have few , and they are all great, and punch way above there weight , when compared to others , and if you can pick up something 2nd hand you can usually
end up with a bargin.
If you have the chance of getting the TRB1004 go for it you wont be disappointed !!
Its a wonderful thing bass snobbery , just leaves all the bargins to us realists !!!!