Okay I searched everywhere and found only one PDF from JBL.com and I am in need of just a little help.
I have some JBL MI 632 cabinets that I purchased from my dad a few years ago. I can only determine they are MI 632's. Currently they are sitting in my lead guitarist loft because we don't have room to store them in my garage or use them for practice. I have used them quite a few time for live gigs but I feel like I did not get there full potential. They are relatively lightweight for their sound output.
The info I have from JBL's vintage site is that they are 150w/300w 2 way speakers. Looking at them I see what I SWEAR is an 18" woofer and a horn driver and two square ported holes near the top beside the horn. The 18" (even though JBL says it is a 15") is recessed with a metal mesh grill cover. The wood feels like a rough MDF or partical board ...might explain the lighter weight. Covered in a charcoal gray tolex of some sorts with square JBL labeled plastic corner pieces. Here is where I get lost ... it has square metal handles that say MR Series on the grip AND the input is : (2) 1/4" with a two or three way switch that is for high, low, mid range setting. I saw a few pictures of these cabs with a pot of some sort to dial in the freq??? unsure.
I don't know a lot about these beauties so any info is helpful and I will be very thankful.
I will get some pictures of them hopefully this weekend so you can look them over. I have yet to find a good picture of them on the internet. I think they are from the 80's according to the JBL website but they look like the modern cabs today. Well I guess they favor the MRs and the SRs.
By the way if you know the best way to operate these I am listening.
I currently have a Soundtech MegaMix10 900watts, Peavey Unity 1200 unpowered, 1200 watt power amp, JBL TR225 Mains ( i know most people hate these but they work so well for our music : metal) 15" 2 way custom cab main/monitors, 4 15" wedge monitors. I love JBL and Soundtech and I have managed to marry the system quite well together for some great sounding gigs and I am looking or should I say needing to include the MI 632's for some of our larger gigs now but I am not sure yet if that would be best. I used to use the MI's or TR's and they sounded about equal to both their volumes and quailty.
Thank You for you help in advance.
AFF