Castle Richmond IV is a 2-way Passive Bass Reflex Bookshelf speaker by Castle. It was released in 2018. It features a 1.25" Soft-Dome Tweeter and 1 x 6" Woofer.
The fourth Richmond: a 150 mm bass/mid and a 32 mm soft dome with a rear chamber, rear reflex port, Linkwitz-style crossover. Castle's spec table says 87 dB; its own description says 88. 25-100 W, 58 Hz-22 kHz. No impedance is published. Now in Castle's archive.
The speaker has a frequency range of 58-22k Hz and a sensitivity of 87 dB.
Room Size Suitability
The size of the room where you plan to use the Castle Richmond IV is a crucial factor in your decision. We have assessed its suitability for various room sizes based on its dimensions and maximum power output:
| Listening Environment* |
Suitability |
| Near-field | Average |
| Small Room | Good |
| Mid-size Room | Average |
| Large Room | Poor |
| Very Large Room | Bad |
(* Approximate Room sizes: Small < 100sq. ft / 9 m2, Mid-size: 100-220 sq. ft / 9-20 m2, Large 220-400 sq. ft / 20-36 m2, Very Large: > 400 sq. ft / 36 m2.
Average Floor Height: 9" / 2.7m. Typical room sizes differ from country to country, and the actual listening experience changes depending on floor height, room shape, surface materials, listening position, speaker locations, etc.)
Frequency Response of the Castle Richmond IV Speaker
Castle Richmond IV has a Frequency response range of 58-22k Hz and Power Range of 25-100 watts. With a minimum frequency of 58 Hz, Richmond IV delivers moderate bass depth so depending on your use case, you might want to consider adding a subwoofer to your system.
Here we have a comparison of how Richmond IV's Low frequency value compares with the average, max and min Low frequency values in its class.
Low Frequency
Bookshelf Speakers
Thinking about a subwoofer for the Castle Richmond IV?
Crossover frequency of the Castle Richmond IV?
The crossover frequency of the Richmond IV is set to 2.6 kHz. This is the threshold frequency where the higher frequency signals over this level are sent to the tweeter and the lower-frequency signals are sent to the woofer by the crossover component.
Impedance and Sensitivity
Castle Richmond IV has a sensitivity of
87 dB.
Sensitivity
Bookshelf Speakers
The maker does not publish a nominal impedance for the Castle Richmond IV.
Sensitivity
With a sensitivity level of only 87 dB, Castle Richmond IV is a difficult to drive speaker from Sensitivity perspective, make sure to choose an amplifier with a high output if you like listening to your music at high volume levels. You may especially have a hard time using Tube amplifiers which are traditionally very low power compared to Class A/B or Class D amps.
Prefer to browse? See every integrated amplifier we cover.
Input Type
Richmond IV features Binding post type connectors.
Work out what gauge speaker cable this run needs →
Castle Richmond IV External Dimensions and Weight
Castle Richmond IV has external dimensions of (Height x Width x Depth) 12 x 7-1/2 x 10-5/16inch (305.0 x 190.0 x 262.0mm ).
Base Surface Area
Base surface area of a loudspeaker may become a determining factor when the space in your room or desk is limited.
The base area of Castle Richmond IV is approximately 497.8cm2 / 77.2inch2.
Millimetres are hard to picture, so here is the Castle Richmond IV drawn to scale next to the Klipsch R-51M, the speaker our readers compare it with most often.
Size, drawn to scale
Both speakers and both views share one scale, so everything here is directly comparable. Hover a box for its dimensions.
One scale for both, standing on the same surface and pushed back to the same wall, so the deeper one visibly sticks out further.
Castle Richmond IV needs about 30% more floor or shelf area. Castle Richmond IV is 47mm deeper, so it stands that much further out from the wall. Klipsch R-51M is 33mm taller.
Full comparison: Castle Richmond IV vs Klipsch R-51M ›
Find speakers that fit your shelf or alcove → · Work out where they should sit in the room →
WeightThe Castle Richmond IV weighs 6.30kg / 13.9lbs per piece. Here is a comparison of how Richmond IV's weight compares with the average, max and min weights in its class.
Weight
All Bookshelf Speakers
Cabinet type and Materials
Castle Richmond IV has a
Bass Reflex type cabinet. Bass Reflex type loudspeakers (aka Ported, Vented or Reflex Port) have enclosures that uses a port, hole or vent cut into the cabinet. Ported designs are generally more efficient than the Sealed designs.
Port Position
Castle Richmond IV is a rear-firing port speaker so you have to make sure you leave enough space between the back of the speaker and wall or bookshelf so that it has room to breathe.
Wall Mounting
Richmond IV doesn't sport any built-in mounting bracket, so you need an external structure to mount it on walls.
Recommended Accessories
Here is a list of accessories that we think you may need for the Castle Richmond IV.
- Speaker Cable and Connectors
- Vibration Isolators: IsoAcoustics isolators are our favorite isolators but you may find more affordable options too.
- Acoustic Panels and Treatments: Your room is as important as your stereo equipment so acoustic treatments goes a long way in improving the overall performance.
- Speaker Stands: Stands bring your bookshelf speakers to ideal height (rule of thumb is to have the tweeter level with your ear in your listening position), helps stability and acoustical isolation.
Official Product Page
Official manufacturer's product page for the Castle Richmond IV speaker can be found below:
Official Product Page for Castle Richmond IV