National RQ-568

There aren't very many monophonic boomboxes with 3 speakers. The National RQ-568 is one of them. It has a big 18cm woofer, a 6.5cm tweeter under the cassette door, and a 3cm tweeter in the upper right corner. The vertical column of 4 small holes on the right side of the boombox is where the condensor mic sits. On the top right corner there is a hole called "System Up Hole". This is where you can attach an external mic. The RP-3091 Parabolic Reflector (shown in the last photo) can fit into this hole.

This boombox has adjustable Bass and Treble, Loudness, Aux Input, Mic Mixing, and manual recording level adjustment. Overall dimensions are 427x280x145mm. It takes 8 D-cell batteries. According to the service manual, its output power is 4.5 watts according to the EIAJ/DC testing standard. The cassette deck's frequency response is 60 to 12,500 Hz when using Chrome tape, and its wow and flutter is 0.12% WRMS.